A filter automatic cleaning structure includes: a filter tank having a first receiving space, a first opening, at least one first water inlet hole, at least one first water outlet hole, a first bus bar and at least a filter material, the first accommodating space is provided with a filtering device and a first rinsing device, wherein the first rinsing device is provided with a first diverting member, wherein the first diverting member is provided with a plurality of diverting ends and a plurality of a nitration tank, which is provided with a second accommodating space, a second opening, at least one second water inlet hole, at least one second water outlet hole, a second bus bar and at least one filter material, the second volume The second flushing device is provided with a second shunting device, and the second shunting device is provided with a plurality of split ends and a plurality of through holes； thereby providing a filter automatic The cleaning structure, especially in the cleaning process, uses the automatic flushing method to remove the impurities in the filter material, and retains the nitrifying bacteria, and achieves the function of the filter with automatic cleaning.一種過濾器自動清洗結構，係包含：一過濾槽，其係設有一第一容置空間、一第一開口、至少一第一入水孔、至少一第一出水孔、一第一匯流件及至少一濾材，該第一容置空間內係設有一過濾裝置及一第一沖洗裝置，該第一沖洗裝置係設有一第一分流件，該第一分流件係設有複數個分流端及複數個通孔；一硝化槽，其係設有一第二容置空間、一第二開口、至少一第二入水孔、至少一第二出水孔、一第二匯流件及至少一濾材，該第二容置空間內係設有一第二沖洗裝置，該第二沖洗裝置係設有一第二分流件，該第二分流件係設有複數個分流端及複數個通孔；藉此，提供一種過濾器自動清洗結構，尤指一種於清洗過程中，利用自動沖洗方式將濾材內的雜質排除，並保留硝化細菌，俾達到具自動清洗之過濾器功能者。
